Kurzweil PC2 Series Service Manual
7-18
Connector Board (rack models)–Power Supply/Audio (page 3 of 3)
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
A
B
C
D
A
B
C
D
AGND
RIGHT
LEFT
J322
PC2R FRONT PANEL VOL/PWR/HPhones
5
+5Vref
1
14VAC
2
14VACSW
3
9VDC
4
9VDCSW
10
7
DGND
8
9
6
WPR
-+
NO
NO
NC
NC
RY1
DPDT
110
8
3
9
2
7
4
+
C30
1000uF, 25V
12
3
+
C31
470uF, 25V
12
3
GJ1
JUMPER
2
1
J321
PC88II PWR
1
5
4
2
3
D17
S1A
12
D14
S1A
12
D15
S1A
12
J302
PC88II AUDIO OUT
2
LOUT~
4
ROUT+
5
ROUT~
3
AGND
1
LOUT+
VR1
78T05
2
GND
1
IN
3
OUT
VR2
78M12
2
GND
1
IN
3
OUT
J301
PC88 II POWER
5
+12V
3
-12V
2
5V_DIG
6
MUTE
8
PWRUPRST
4
AGND
7
BUVdd
1
DGND
L3
FB2.5TSMT
12
L4
FB2.5TSMT
12
U5
74HCU04
56
C41
0.1uF
12
C42
0.1uF
12
VR3
79L12ACM
5
GND
2
I1
3
I2
6
I3
7
I4
1
OUT
C54
0.1uF
12
C53
0.1uF
12
C52
0.1uF
12
C51
0.1uF
12
C50
0.1uF
12
C35
0.1uF
12
C29
0.1uF
12
C26
1000PF
12
C27
1000PF
12
C39
0.22uF
12
C33
0.1uF
12
C32
0.1uF
12
C38
0.1uF
12
C44
0.1uF
12
C55
100pF
12
C46
100pF
12
+
C28
100uF 16V
12
+
C34
100uF 16V
12
+
C40
1000uF 16V
12
+
C36
100uF 16V
12
+
C37
100uF 16V
12
Q7
MMBT2222
B
C
E
Q15
KSC2331
B
C
E
Q14
KSC2331
B
C
E
Q9
MMBT2222
B
C
E
+
-
U9
NE5532
3
2
84
1
D21
LL4148
12
D22
S1A
12
R118
1.6K
12
R19
5.6K
12
R18
470
12
R117
470
12
R8
5.6K
12
R119
1M
12
R122
15.0K 1%
12
R129
3K
12
R127
3K
12
R128
220
12
R120
1K
12
R126
220
12
R123
15.0K 1%
12
R130
200 1% 1/3W
12
R124
200 1% 1/3W
12
R139
200 1% 1/3W
12
R141
200 1% 1/3W
12
R133
15.0K 1%
12
R134
47
12
R142
15.0K 1%
12
R132
15.0K 1%
12
R15
100K
12
R121
10K
12
R137
47
12
R138
15.0K 1%
12
R135
15.0K 1%
12
R136
15.0K 1%
12
Q4
MMBT2907
C
B
E
Q12
MMBT2907
C
B
E
Q13
MMBT2907
C
B
E
Q8
MMBT2907
C
B
E
J312
JACK
1
6
2
5
3
4
J311
JACK
1
6
2
5
3
4
+
-
U9
NE5532
5
6
7
YOUNG CHANG CO., LTD.
of Young Chang Co., Ltd. is prohibited.
Reproduction without the express written consent
Filename:
Doc:
Mfg:
Eng:
Sht
By:
Date:
of
Rev:
PC2 Rack Connector PCB
POWER SUPPLY/AUDIO
D. O'Neill
021250-000 B V3
021250B3 9/29/2000
33
+12V
+17V
PWRUPRST {1-A8}
VCC
+12V
~17V
~12V
VCC
~12V
+5Vref {1-C5}
VOLUME {1-B7}
HPLEFT
HPRIGHT
+12V
+9V VCC
+12V
BUVdd
+9V VCC +9V
~12V
VCC
HPLEFT
HPLEFT
HPRIGHT
HPRIGHT
RESET {1-A1}
VCC
Note on signal polarity; Line out TIP, Headphone out and Digital out = positive going signal. The Digital out is inverted with respect to the output of the DAC
ONE EACH AT GROUND PINS OF U1, U2, U5, U7, U11
RING = -
RING = -
TIP = +
TIP = +
RIGHT
LEFT/MONO
LEFT/MONO
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